* [Introduction](index.md)
  * [Upgrade guide](upgrade-guide.md)
* [XR Origin](xr-origin.md)
  * [Add the XR Origin to a scene](xr-origin-setup.md)
  * [XR Origin components and properties](xr-origin-reference.md)
* [Project validation](project-validation.md)
* [Building Blocks](building-blocks.md)
* [Capability Profile](capability-profile.md)